While I learned about ATP and process of photosynthesis at school, (by the way, I'm highschool kid) I found that energy efficiency of ATP is almost equal to that of carnot heat engine's. I wonder that if we if we applied this ATP to energy engines like batteries, wouldn't it be possible to create a ...

The next two questions are questions I took today as a mock test for Korean Scholastic Aptitude Test. Yeah, I got both questions wrong, I'll translate the following two questions to you and show them to you. Let's see how you can solve them in 6 minutes (Actually, this is also a time consuming gift)...

Singijeon(신기전) is a Korean traditional weapon.(It is known as Hwa-cha in other countries.) It was created in 1440 by King Sejong the Great and during the reign of King Sejong, Korea's scientific technology was superior to any other country. Singijeon is a automatic arrow launch system, which is a pr...

If you take some surface layer of the northern hemisphere and distribute it over the southern hemisphere, all you do is shift the equator a bit relative to the continent outlines. You don't change the fact that Earth is a rotating sphere. The core is now slightly off-center, it will shift a bit aft...

Most of all, most of the land is in the Northern Hemisphere, and the vast majority of the big cities are in the Northern Hemisphere, too. Does this fact have a huge impact on the Earth's rotation? If so, if everybody moved to the southern hemisphere (including everything they built), would it change...